3  * huawei-gaokun-ec - An EC driver for HUAWEI Matebook E Go
19 #include <linux/platform_data/huawei-gaokun-ec.h>
118 	struct mutex lock; /* EC transaction lock */
125 static int gaokun_ec_request(struct gaokun_ec *ec, const u8 *req,  in gaokun_ec_request()  argument
128 	struct i2c_client *client = ec->client;  in gaokun_ec_request()
144 	guard(mutex)(&ec->lock);  in gaokun_ec_request()
153 		dev_err(&client->dev, "EC transaction error %d\n", ret);  in gaokun_ec_request()
165  * gaokun_ec_read - Read from EC
166  * @ec: The gaokun_ec structure
171  * This function is used to read data after writing a magic sequence to EC.
172  * All EC operations depend on this function.
182 int gaokun_ec_read(struct gaokun_ec *ec, const u8 *req,  in gaokun_ec_read()  argument
185 	return gaokun_ec_request(ec, req, resp_len, resp);  in gaokun_ec_read()
190  * gaokun_ec_write - Write to EC
191  * @ec: The gaokun_ec structure
199 int gaokun_ec_write(struct gaokun_ec *ec, const u8 *req)  in gaokun_ec_write()  argument
203 	return gaokun_ec_request(ec, req, sizeof(ec_resp), ec_resp);  in gaokun_ec_write()
207 int gaokun_ec_read_byte(struct gaokun_ec *ec, const u8 *req, u8 *byte)  in gaokun_ec_read_byte()  argument
212 	ret = gaokun_ec_read(ec, req, sizeof(ec_resp), ec_resp);  in gaokun_ec_read_byte()
220  * gaokun_ec_register_notify - Register a notifier callback for EC events.
221  * @ec: The gaokun_ec structure
226 int gaokun_ec_register_notify(struct gaokun_ec *ec, struct notifier_block *nb)  in gaokun_ec_register_notify()  argument
228 	return blocking_notifier_chain_register(&ec->notifier_list, nb);  in gaokun_ec_register_notify()
233  * gaokun_ec_unregister_notify - Unregister notifier callback for EC events.
234  * @ec: The gaokun_ec structure
240 void gaokun_ec_unregister_notify(struct gaokun_ec *ec, struct notifier_block *nb)  in gaokun_ec_unregister_notify()  argument
242 	blocking_notifier_chain_unregister(&ec->notifier_list, nb);  in gaokun_ec_unregister_notify()
251  * @ec: The gaokun_ec structure
258 int gaokun_ec_psy_multi_read(struct gaokun_ec *ec, u8 reg,  in gaokun_ec_psy_multi_read()  argument
267 		ret = gaokun_ec_read(ec, ec_req, sizeof(ec_resp), ec_resp);  in gaokun_ec_psy_multi_read()
280  * gaokun_ec_psy_get_smart_charge - Get smart charge data from EC
281  * @ec: The gaokun_ec structure
286 int gaokun_ec_psy_get_smart_charge(struct gaokun_ec *ec,  in gaokun_ec_psy_get_smart_charge()  argument
294 	ret = gaokun_ec_read(ec, ec_req, sizeof(ec_resp), ec_resp);  in gaokun_ec_psy_get_smart_charge()
311  * @ec: The gaokun_ec structure
316 int gaokun_ec_psy_set_smart_charge(struct gaokun_ec *ec,  in gaokun_ec_psy_set_smart_charge()  argument
328 	return gaokun_ec_write(ec, ec_req);  in gaokun_ec_psy_set_smart_charge()
336  * @ec: The gaokun_ec structure
341 int gaokun_ec_psy_get_smart_charge_enable(struct gaokun_ec *ec, bool *on)  in gaokun_ec_psy_get_smart_charge_enable()  argument
348 	ret = gaokun_ec_read_byte(ec, ec_req, &state);  in gaokun_ec_psy_get_smart_charge_enable()
360  * @ec: The gaokun_ec structure
365 int gaokun_ec_psy_set_smart_charge_enable(struct gaokun_ec *ec, bool on)  in gaokun_ec_psy_set_smart_charge_enable()  argument
370 	return gaokun_ec_write(ec, ec_req);  in gaokun_ec_psy_set_smart_charge_enable()
378  * gaokun_ec_ucsi_read - Read UCSI data from EC
379  * @ec: The gaokun_ec structure
386 int gaokun_ec_ucsi_read(struct gaokun_ec *ec,  in gaokun_ec_ucsi_read()  argument
393 	ret = gaokun_ec_read(ec, ec_req, sizeof(ec_resp), ec_resp);  in gaokun_ec_ucsi_read()
403  * gaokun_ec_ucsi_write - Write UCSI data to EC
404  * @ec: The gaokun_ec structure
411 int gaokun_ec_ucsi_write(struct gaokun_ec *ec,  in gaokun_ec_ucsi_write()  argument
418 	return gaokun_ec_write(ec, ec_req);  in gaokun_ec_ucsi_write()
423  * gaokun_ec_ucsi_get_reg - Get UCSI register from EC
424  * @ec: The gaokun_ec structure
431 int gaokun_ec_ucsi_get_reg(struct gaokun_ec *ec, struct gaokun_ucsi_reg *ureg)  in gaokun_ec_ucsi_get_reg()  argument
437 	ret = gaokun_ec_read(ec, ec_req, sizeof(ec_resp), ec_resp);  in gaokun_ec_ucsi_get_reg()
448  * gaokun_ec_ucsi_pan_ack - Ack pin assignment notifications from EC
449  * @ec: The gaokun_ec structure
456 int gaokun_ec_ucsi_pan_ack(struct gaokun_ec *ec, int port_id)  in gaokun_ec_ucsi_pan_ack()  argument
466 	return gaokun_ec_write(ec, ec_req);  in gaokun_ec_ucsi_pan_ack()
471 /* EC Sysfs */
474 static int gaokun_ec_get_fn_lock(struct gaokun_ec *ec, bool *on)  in gaokun_ec_get_fn_lock()  argument
481 	ret = gaokun_ec_read_byte(ec, ec_req, &state);  in gaokun_ec_get_fn_lock()
495 static int gaokun_ec_set_fn_lock(struct gaokun_ec *ec, bool on)  in gaokun_ec_set_fn_lock()  argument
501 	return gaokun_ec_write(ec, ec_req);  in gaokun_ec_set_fn_lock()
508 	struct gaokun_ec *ec = dev_get_drvdata(dev);  in fn_lock_show()  local
512 	ret = gaokun_ec_get_fn_lock(ec, &on);  in fn_lock_show()
523 	struct gaokun_ec *ec = dev_get_drvdata(dev);  in fn_lock_store()  local
530 	ret = gaokun_ec_set_fn_lock(ec, on);  in fn_lock_store()
555 static int gaokun_ec_get_temp(struct gaokun_ec *ec, u8 idx, long *temp)  in gaokun_ec_get_temp()  argument
563 	ret = gaokun_ec_read(ec, ec_req, sizeof(ec_resp), ec_resp);  in gaokun_ec_get_temp()
584 	struct gaokun_ec *ec = dev_get_drvdata(dev);  in gaokun_ec_hwmon_read()  local
587 		return gaokun_ec_get_temp(ec, channel, val);  in gaokun_ec_hwmon_read()
622 	struct gaokun_ec *ec = dev_get_drvdata(dev);  in gaokun_ec_suspend()  local
626 	if (ec->suspended)  in gaokun_ec_suspend()
629 	ret = gaokun_ec_write(ec, ec_req);  in gaokun_ec_suspend()
633 	ec->suspended = true;  in gaokun_ec_suspend()
640 	struct gaokun_ec *ec = dev_get_drvdata(dev);  in gaokun_ec_resume()  local
645 	if (!ec->suspended)  in gaokun_ec_resume()
649 		ret = gaokun_ec_write(ec, ec_req);  in gaokun_ec_resume()
653 		msleep(100); /* EC need time to resume */  in gaokun_ec_resume()
656 	ec->suspended = false;  in gaokun_ec_resume()
677 			   struct gaokun_ec *ec)  in gaokun_aux_init()  argument
690 	adev->dev.platform_data = ec;  in gaokun_aux_init()
710 /* EC */
714 	struct gaokun_ec *ec = data;  in gaokun_ec_irq_handler()  local
719 	ret = gaokun_ec_read_byte(ec, ec_req, &id);  in gaokun_ec_irq_handler()
728 		gaokun_ec_psy_read_byte(ec, EC_LID_STATE, &status);  in gaokun_ec_irq_handler()
730 		input_report_switch(ec->idev, SW_LID, !status);  in gaokun_ec_irq_handler()
731 		input_sync(ec->idev);  in gaokun_ec_irq_handler()
735 		blocking_notifier_call_chain(&ec->notifier_list, id, ec);  in gaokun_ec_irq_handler()
744 	struct gaokun_ec *ec;  in gaokun_ec_probe()  local
747 	ec = devm_kzalloc(dev, sizeof(*ec), GFP_KERNEL);  in gaokun_ec_probe()
748 	if (!ec)  in gaokun_ec_probe()
751 	ret = devm_mutex_init(dev, &ec->lock);  in gaokun_ec_probe()
755 	ec->client = client;  in gaokun_ec_probe()
756 	i2c_set_clientdata(client, ec);  in gaokun_ec_probe()
757 	BLOCKING_INIT_NOTIFIER_HEAD(&ec->notifier_list);  in gaokun_ec_probe()
760 	ec->idev = devm_input_allocate_device(dev);  in gaokun_ec_probe()
761 	if (!ec->idev)  in gaokun_ec_probe()
764 	ec->idev->name = "LID";  in gaokun_ec_probe()
765 	ec->idev->phys = "gaokun-ec/input0";  in gaokun_ec_probe()
766 	input_set_capability(ec->idev, EV_SW, SW_LID);  in gaokun_ec_probe()
768 	ret = input_register_device(ec->idev);  in gaokun_ec_probe()
772 	ret = gaokun_aux_init(dev, GAOKUN_DEV_PSY, ec);  in gaokun_ec_probe()
776 	ret = gaokun_aux_init(dev, GAOKUN_DEV_UCSI, ec);  in gaokun_ec_probe()
782 					dev_name(dev), ec);  in gaokun_ec_probe()
786 	ec->hwmon_dev = devm_hwmon_device_register_with_info(dev, "gaokun_ec_hwmon",  in gaokun_ec_probe()
787 							     ec, &gaokun_ec_hwmon_chip_info, NULL);  in gaokun_ec_probe()
788 	if (IS_ERR(ec->hwmon_dev))  in gaokun_ec_probe()
789 		return dev_err_probe(dev, PTR_ERR(ec->hwmon_dev),  in gaokun_ec_probe()
796 	{ "gaokun-ec", },
802 	{ .compatible = "huawei,gaokun3-ec", },
813 		.name = "gaokun-ec",
823 MODULE_DESCRIPTION("HUAWEI Matebook E Go EC driver");